Infiniti QX56 (Z62). Manual - part 217

CCS

U0126 STRG SEN CAN 1

CCS-135

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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U0126 STRG SEN CAN 1

ADAS CONTROL UNIT

ADAS CONTROL UNIT : DTC Logic

INFOID:0000000006224386

DTC DETECTION LOGIC

NOTE:
If DTC “U0126” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U0126” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U0126” detected as the current malfunction?

YES

>> Refer to 

CCS-135, "ADAS CONTROL UNIT : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

ADAS CONTROL UNIT : Diagnosis Procedure

INFOID:0000000006224387

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U0126” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ABS”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

BRC-51, "DTC Index"

. 

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

ICC SENSOR

ICC SENSOR : DTC Logic

INFOID:0000000006224388

DTC DETECTION LOGIC

NOTE:
If DTC “U0126” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145, "ICC

SENSOR : DTC Logic"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

U0126

(130)

STRG SEN CAN CIR1

If ADAS control unit detects an error signal 
that is received from steering angle sensor via 
CAN communication

Steering angle sensor

DTC

Trouble diagnosis name

DTC detecting condition

Possible causes

U0126

STRG SEN CAN CIR1

If ICC sensor detects an error signal that is re-
ceived from steering angle sensor via ADAS 
control unit

Steering angle sensor

CCS-136

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

U0126 STRG SEN CAN 1

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U0126” is detected as the current malfunction in “Self Diagnostic Result” of “LASER”. 

Is “U0126” detected as the current malfunction?

YES

>> Refer to 

CCS-136, "ICC SENSOR : Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

ICC SENSOR : Diagnosis Procedure

INFOID:0000000006224389

1.

CHECK ICC SENSOR SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U0126” in “Self Diagnostic Result” of “LASER”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ICC SENSOR : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ADAS CONTROL UNIT SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ICC/ADAS”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

CCS-50, "DTC Index"

. 

NO

>> Replace the ICC sensor. Refer to 

CCS-176, "Exploded View"

. 

CCS

U0235 ICC SENSOR CAN 1

CCS-137

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

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U0235 ICC SENSOR CAN 1

DTC Logic

INFOID:0000000006224390

DTC DETECTION LOGIC

NOTE:
If DTC “U0235” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145, "ICC

SENSOR : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U0235” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U0235” detected as the current malfunction?

YES

>> Refer to 

CCS-137, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224391

1.

CHECK ADAS CONTROL UNIT SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U0235” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ICC SENSOR SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “LASER”.

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

CCS-55, "DTC Index"

. 

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

DTC

(On board dis-

play)

Trouble diagnosis name

DTC detecting condition

Possible causes

U0235

(144)

ICC SENSOR CAN 
CIR1

If ADAS control unit detects an error signal 
that is received from ICC sensor via ITS com-
munication

ICC sensor

CCS-138

< DTC/CIRCUIT DIAGNOSIS >

[ICC]

U0401 ECM CAN 1

U0401 ECM CAN 1

DTC Logic

INFOID:0000000006224392

DTC DETECTION LOGIC

NOTE:
If DTC “U0401” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

CCS-145,

"ADAS CONTROL UNIT : DTC Logic"

. 

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine.

2.

Turn the MAIN switch of ICC system ON. 

3.

Perform “All DTC Reading” with CONSULT-III. 

4.

Check if the “U0401” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U0401” detected as the current malfunction?

YES

>> Refer to 

CCS-138, "Diagnosis Procedure"

.

NO

>> Refer to 

GI-40, "Intermittent Incident"

. 

Diagnosis Procedure

INFOID:0000000006224393

1.

CHECK SELF-DIAGNOSIS RESULTS

Check if “U1000” is detected other than “U0401” in “Self Diagnostic Result” of “ICC/ADAS”. 

Is “U1000” detected?

YES

>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.

Refer to 

CCS-145, "ADAS CONTROL UNIT : DTC Logic"

. 

NO

>> GO TO 2.

2.

CHECK ECM SELF-DIAGNOSIS RESULTS

Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. 

Is any DTC detected?

YES

>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to

EC-98, "DTC Index"

.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

. 

DTC

(On board 

display)

Trouble diagnosis name

DTC detecting condition

Possible causes

U0401

(120)

ECM CAN CIR1

If ADAS control unit detects an error signal 
that is received from ECM via CAN communi-
cation

ECM